Sheet-delivery apparatus for printing-machines



S. N TI. K W Am ,H Tu. M M m SHEET DELIVERY APPARATUS POR PRINTINGMAGHINES.

Patented Peb. 16

112V @v1/'harm NA PETERS. Pham-Limos ilNirEn STATES PATENT OEErCEO' JOHN T. HAVKINS, OF TAUNTON, MASSACHUSETTS.

SHEET-DELIVERY APPARATUS FOR PRINTING-MACHINES.

CPECIFICAIIOIT forming part of Letters Patent No. 336.108, dated February 16, 1886.

Application filed May G, |885. Serial No. 164,557. (Xo model.)

To all whom it may concern? Be it known that I, JOHN T. HAwKINs, of Taunton, in the county ofBristol and State ot Massachusetts, have invented certain new and useful Improvements in Sheet-Delivery Apparatus for Printing-Machines, which invention or improvement is fully set forth and illustrated in the following specification and accompanying drawings.

The object of this invention is, in an oscillating-cylinderpress delivering the sheets from the top of the cylinder, to provide means for keeping the sheet in contact with the cylinderv surface or its covering during its delivery, which shall cause a current or currents of air to be directed upon the said cylinder or interposed sheet for said purpose.

The invention consists of the parts and combinations of parts,as herein deseribed,an l specifically set forth in the claims.

In the accompanying drawings, Figure l is a side elevation, principally 'in longitudinal vertical section, through the center of the machine. Fig. 2 is a rear elevation of the machine, with the type-bed partlyin section, the driving-shaftpartly broken away,and thefeedboard and concomitant parts removed for the sake of greater clear-ness of illustration. Fig. :Sis aside view of the arrangement of an oscillating guide for the connecting-rod rack, and Fig. Liis a transverse section through the same. Figs. 5, 6, and 7 illustrate details hereinafter described.

In said figures the several parts are respect ively indicated by letters as follows:

A and A are the main or side frames; D,the type-bed; C, the impression-cylinder, rotating upon an eccentrical rock-shaft, C.

R is a rack secured to the upper side of the bed D.

R' is agearwheel secured to the cylinder C.

R2 is a rack secured to the underside of t-he bed D.

-Ris a shaftjournaled at one end in the frame A, and at the other end in a bracket, R5, secured to the cross-stay B. To the inner side of the shaft R4 is secured a gear-Wheel, R3, engaging the rack R2, and upon its outer end, outside of frame A, is secured another gear- Wheel, R6.

S is a shaft journaled in the frames A and A. On shaft S, outside of frame A, is secured a gear-wheel, S', carrying a crank-pin, S. Articulated to crank-pin S2 is a connectingrod, S, having its free end formed into a rack, S4, engaging the gear-wheel R6.

S5 is a guide oscillating` freely upon the shaft R,within which said shaft freely turns. The guide S5 has formed upon it a projecting tongue, S, which iits into a corresponding groove, S7, formed in the side of the rack S. The projecting guide S5 holds the rack S4 in proper depth of mesh with the gear-wheel R.

T is a shaft journaled in the frames A A'. The shaft T has secured to it the pinion T', engaging the gear-wheel S. The shaft T also carri-es on its outer end either pulleys T2 or a crank, (not sl1own,) according as the machine may be driven by either hand or other power. The shafts t t are journaled in the frames A A', each shaft carrying rotary fans t2 zf".` Upon the shafts t and t' are secured pulleys t, t5, and t", and upon shaft T is secured a pulley, t7.

. Enwrapping pulleys tl and t is a belt, t8, and

enwra'pping pulleys t5 and t* is another belt, t9.

P is a guard extending across the machine, (not shown in Fig. 2,) to prevent the air discharged i'rom the fan t2 from disturbing the sheets upon the feed-board F ofthe machine. The sheet-supports s so support the tail end of the sheet from Contact with cylinder C, and a series of stripper-fingers, s', strip the sheet from the cylinder, both in the manner substantially described in the application filed by me on the 15th day of March, 1884, (Oase A,) Serial No. 124,297.

The operation of the machine is as follows: Power is applied to the shaft T by the pulleys T2 or by a crank, as the machine can be actuated either by hand or other power. Thepinion T' imparting rotary motion to the crank-gear S', the connecting-rod S3 operates as an oscillating and reciprocating rack and imparts oscillating motion to the shaft It* and reciprocating motion to the bed D by means of the gear- Wheels R6 and R3 and the rack R2. The gearwheels R and R'J'may be varied in proportion,

so as to give to the bed D any length oftravel as compared to the throw of the crank-pin S2 that may be desired. The rotary fans t2 and t3 are driven by means of the pulleys t7, t, t, and t* and belts t@ and 1.9, so as to project currents of IOO air against the face of cylinder G or the sheet upon it. The guide S5 sliding in the groove S7 of the rack S", and oscillating with it about the center of the shaft R4, keeps the rack S4 constantly in gear at the properdepth of mesh withr the gear-wheel R6.

I do not herein claim thesheet-supports s s", per se, nor the means for reciprocating the type-bed, said means for reciprocating said bed being claimed in another application filed by me on the 28th day ot' April, 1884, bearing the Serial No. 129,651.

Having thus iully described my said improvements, as of my invention I claim- 1. In a printing-press in which the sheets are delivered from the top of the cylinder, in combination with said cylinder, means forprojecting currents of air against the sheet upon it, to insure frictional contact between the sheet and cylinder during delivery, consisting of a rotating fan or fans, as t'lt, arranged between the points of feed and delivery, and suitably driven by any rotary member of the machine, substantially as set forth.

2. In an oscillating-cylinder printing-press Ain which thesheets are delivered tail first from l theimpression-cylinder, the combination,with said cylinder, of sheet-supports, as s s", for supporting the tail margin of the sheet away from contact with the impression-cylinder, and rotating fans, as t2 t, for projecting currents of air against the sheet, to insure frictional contact between the sheet and cylinder during the process of delivery, substantially as set forth.

3. In the sheet-delivery apparatus of an oscillating-cylinder printing-press, in which the sheets are delivered tail rst from the cylinder, the combination, with said cylinder, of sheetsupports, as s s", for supporting the tail niargin ofthe sheet from contact with the cylinder, rotating fans, as t2 t3, for projecting currents of air against the sheet, toinsure frictional con tact between the sheet and cylinder during the process of delivery, and a series of stripper` lingers, as s, for stripping the sheets from the cylinder, substantially as set forth.

JOHN T. HAVVKINS.

\Vitnesses:

WM. C. FINDLAY, FRANCIS P. REILLY. 

